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The choreotrichs are a group of small marine ciliates. Their name reflects the impression that they appear to dance. The group includes the tintinnids, which produce species-specific loricae (shells), and are important because these may be preserved as microfossils. The cyst forms have been suggested to be affiliated to Chitinozoans, although other studies suggest Chitinozoans to have affinities to larger marine animals, and not tintinnids. Often they have been included among the oligotrichs. Tintinnids seem to be an excessively specious group as over 400 living species have been described, based on characteristics of the lorica or shell.
Chitinozoa are a taxon of flask-shaped, organic walled marine microfossils produced by an as yet unknown animal. Common from the Ordovician to Devonian periods, the millimetre-scale organisms are abundant in almost all types of marine sediment across the globe. This wide distribution, and their rapid pace of evolution, makes them valuable biostratigraphic markers.
Conochitina is an extinct genus of chitinozoans.
Ancyrochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1955.
Angochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1931.
Belonechitina is an extinct genus of chitinozoans. It was described by Jansonius in 1964.
Bursachitina is an extinct genus of chitinozoans. It was described by Taugourdeau in 1966.
Cingulochitina is an extinct genus of chitinozoans. It was described by Paris in 1981.
Clathrochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1959. It contains a single species, Clathrochitina clathrata.
Cyathochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1955.
Desmochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1931.
Eisenackitina is an extinct genus of chitinozoans. It was described by Jansonius in 1964.
Fungochitina is an extinct genus of chitinozoans. It was described by Taugourdeau in 1966.
Lagenochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1931.
Linochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1968. It contains a single species, Linochitina odiosa.
Margachitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1968.
Plectochitina is an extinct genus of chitinozoans. It was described by Fritz H. Cramer in 1964.
Rhabdochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1931.
Sphaerochitina is an extinct genus of chitinozoans. It was described by Alfred Eisenack in 1955.
Spinachitina is an extinct genus of chitinozoans. It was described by Schallreuter in 1963.
References
- ↑ Tanuchitina at ChitDB: Chitinozoans of Baltica.
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